Maybe players just like to do other stuff too and not only one single content farming...
Can you really do other things? Sure, yea, leave the area and miss the F.A.T.E. because you do not need that one specific F.A.T.E. ... *lol*

After Chocobo leveling with F.A.T.E.S. players can not see them any more!
Those who done so can tell you many stories about "single content farming"...